Results 1 to 10 of about 18,989 (273)
X-ray spectra, light curves and SEDs of blazars frequently observed by Swift [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 Blazars research is one of the hot topics of contemporary extragalactic astrophysics. That is because these sources are the most abundant type of extragalactic γ-ray sources and are suspected to play a central role in multimessenger astrophysics.
O Civitarese, Matteo Perri, F Verrecchia
exaly +2 more sources
On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The gamma-ray emission in broad-line blazars is generally explained as inverse Compton (IC) radiation of relativistic electrons in the jet scattering optical-UV photons from the Broad Line Region (BLR), the so-called BLR External Compton scenario.
L Costamante, S Cutini
exaly +2 more sources
THE SPECTRAL ENERGY DISTRIBUTIONS OF FERMI BLAZARS [PDF]
Astrophysical Journal, Supplement Series, 2016 In this paper, multiwavelength data are compiled for a sample of 1425 Fermi blazars to calculate their spectral energy distributions (SEDs). A parabolic function, is used for SED fitting. Synchrotron peak frequency ( ), spectral curvature (P1), peak flux
Junhui Fan, J H Yang, Hubing Xiao
exaly +2 more sources
Leptohadronic multi-messenger modeling of 324 gamma-ray blazars [PDF]
Astronomy & Astrophysics, 2023 The origin of the diffuse astrophysical neutrino flux observed by the IceCube experiment is still under debate. Multiple associations have been reported between high-energy neutrino events and individual blazars, such as the source TXS 0506+056, which ...
X. Rodrigues +5 more
semanticscholar +1 more source
Correlating High-energy IceCube Neutrinos with 5BZCAT Blazars and RFC Sources [PDF]
Astrophysical Journal Letters, 2023 We investigate the possibility that blazars in the Roma-BZCAT Multifrequency Catalogue of Blazars (5BZCAT) are sources of the high-energy astrophysical neutrinos detected by the IceCube Neutrino Observatory, as recently suggested by Buson et al. Although
C. Bellenghi +3 more
semanticscholar +1 more source
Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz during 10 yr of the VLBA-BU-BLAZAR Program [PDF]
Astrophysical Journal Supplement Series, 2022 We analyze the parsec-scale jet kinematics from 2007 June to 2018 December of a sample of γ-ray bright blazars monitored roughly monthly with the Very Long Baseline Array (VLBA) at 43 GHz under the VLBA-BU-BLAZAR program.
Z. Weaver +9 more
semanticscholar +1 more source
Growing evidence for high-energy neutrinos originating in radio blazars [PDF]
Monthly notices of the Royal Astronomical Society, 2022 Evidence for bright radio blazars being high-energy neutrino sources was found in recent years. However, specifics of how and where these particles get produced still need to be determined.
A. Plavin +3 more
semanticscholar +1 more source
High-energy neutrino emission from blazars [PDF]
International Conference on Rebooting Computing, 2022 Active galactic nuclei (AGN) with relativistic jets are the most powerful persistent astrophysical sources of electromagnetic radiation in the Universe.
F. Oikonomou
semanticscholar +1 more source
Frequency and Time Dependence of Linear Polarization in Turbulent Jets of Blazars [PDF]
Galaxies, 2021 Time-variable polarization is an extremely valuable observational tool to probe the dynamical physical conditions of blazar jets. Since 2008, we have been monitoring the flux and linear polarization of a sample of gamma-ray bright blazars at optical ...
A. Marscher, S. Jorstad
semanticscholar +1 more source
The Central Engines of Fermi Blazars [PDF]
, 2021 We present a catalog of central engine properties, i.e., black hole mass (M BH) and accretion luminosity (L disk), for a sample of 1077 blazars detected with the Fermi Large Area Telescope.
V. Paliya +4 more
semanticscholar +1 more source